There are two types — professional and working.

In appearance, this item is similar to planebones, a hole for the rod and rivets, only in the head. There are two types — professional and working. The first, the form is more powerful, and the working head does not turn. The next, not so large, but the head rotates three hundred and sixty degrees. In principle, these and the species do not differ from each other, only created by effort, and also by the fact that professional can be acted with rivets from aluminum, and with steel. The usual is only enough for aluminum.